P2694: Cylinder 9 Injector Data Incompatible

What it means

The flow calibration data programmed for cylinder 9 injector does not match the format expected by the controller software.

At a glance

• Usually lights the check-engine light

How it works

The engine controller compensates for injector-to-injector flow differences using calibration data. P2694 sets when the data associated with the cylinder 9 injector is not in a format or version the controller recognizes.

Common causes

Most likely first.

1. Replacement injector has different part number than software expects
2. Calibration code format does not match controller version

Symptoms

• Check-engine light
• Possible rough running or reduced power

How to diagnose it

1. Read freeze-frame information and check whether cylinder 9 injector replacement or coding immediately preceded the fault.
2. Verify that the installed cylinder 9 injector is the correct type and that its calibration identifier is intended for this controller.
3. Inspect the cylinder 9 injector connector and harness for loose pins, corrosion, or damage from recent work.
4. Read the stored cylinder 9 calibration with a suitable scan tool and compare the data format with the vehicle's requirements.
5. If the injector and calibration are compatible, check for a supported controller software update or configuration issue.

Common fixes

• Correct the cylinder 9 injector calibration data in the controller.
• Replace an incompatible cylinder 9 injector with the correct specified unit.
• Update or configure the controller software where the manufacturer supports the required calibration format.

Can I keep driving?

A short, gentle drive may be possible if the engine runs normally, but avoid heavy loads if it runs roughly or has reduced power. Ongoing incorrect fueling on cylinder 9 can impair engine operation and contribute to damage.